Adjustable mounting for electric motors



May 28, 1940 c. G. H. ANDERSON ET AL 2,202,413

` ADJUSTABLE MOUNTING' FOB` ELECTRIC MOTORS Filed Feb.' 4, 1938 IIIII IIIIII. Il

3l rlIII Il I. I I l l I I I I I I I L 'Patented' May 248, 19.40 s

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0F FICE Carl vG. Anderson and kI-v'uar'I-KsFog, Toronto,

Ontario, Canada',` assgnors toi SangamoCompany Limited, Toronto',Qntario, Canada, Y

'Application 'The principal objects of this invention, are

to overcome the diiculties met with in providend elevational viewshowing a'motor and mounting exemplifying the present invention.

vFigure 2 is a side elevational view of the motor and mounting shown inFigure 1.

Figure 3 is a plan view.

Figure 4 is aplan viewillustrating a slightly l modified construction.

Figure 5 is an enlarged partial end elevation of the modified structureshown in Figure 4.

ther modification of mounting.

In the use of small electric" motors for vdriving devices such aswashing machines or refrig- 30 erator mechanisms it is customary tooperate the driven mechanism from the motor through the medium of abelt, andrbelt drives aresubject to great variation whichl results inloss of efficiency, and in making adjustments much dif- 35. propertension and in maintaining the alignment of the driving and drivenmembers.

Further, adjustments may be made under temperature and humidityconditions which may al-' most immediately becomey inoperative by reasonof uncontrollable changes in surrounding atmospheric conditions. .n

The present invention contemplatesan extremely simple device which, `asillustrated in Figures 1, 2, and 3, comprises a pair of at iiexibleplates I of metal orv other suitable material having their ends 2secured to the shell 3 of the motor by being welded or riveted or heldby screws 4. These plates extend under the motor shell in the directionof the belt drive 5 to the driven member (not shown), and their otherends are fixed to the base I5 by suitabley bolts or other means l. Y

A plate 8, also of flexible material may be 5; placed between the platesI having one end 9 se- In the accompanying drawing Figure 1 is'an fFigure 6 is an end elevation showing a furculty is experienced both inobtainingy the.

February "4, 193s, serial No. "188,594v 4c1aims. (ci. ziel-23) u `.curedtothe motor-.sh'ell'at thev side opposite to 4the points'of securing theplates I.

y This plate extends lunder the motor in a direction `opposite to thedrive belt, and its end I0 isv secured to the .base bybolts I Ik,

. Themotoriwhen thus secured may roll on its iiexible supportsv but-itsshifting axis will al- Suitable arms I2 are provided on Ythe endhousings to extend in a direction away from the drive belt 5, and coiledtension springs I3 are connected to theends of said arms and to thebase, thus applying afforce tending to roll the motor away from thedriveY belt and auto'- matically maintain a tension on the belt equal tothe tension yof the springs so that the belt will be maintained in itsmost effective operative condition whether it shrinks or expands andwear will be automatically compensated for.

It may be found desirable to dispense with the centre plate 8 andconnectthe two plates at opposite ends" to the vmotor housing as illustrated bythe dotted lines in Figure 4.

In Figure 5 `the holding plates as shown in Figure 4, are arranged ateither side of a pad I4 which may be'of sound deadening material, suchas rubber compressed between the base and motor and a sound deadeningstrip I5 may be arranged between .the motor shell and holding l plates.I

The spring tension device as shown is very simple and inexpensive. Amore simplied but eicient structure'is illustrated in Figure 6 in whichthe motor is mounted on asingle curved spring plate I6, one end of whichis curved upwardly and is secured to the motor. shell on the sideawayfrom the drive belt, the other end being fastened rigidly to the base. y

` In this form of application 1of the invention the motor is located ina position where it has to be rolled toward the driven member in orderto place the belt in position, and the applied, .tension on the curvedspring platewill exert a downward pressure substantially at right anglesis that the curved end of the spring plate I6 is always exerting aconstant self-compensating pull on thev belt and the downward componentof forces holds the motor rmly'against the base block andv preventsvibration.

The exemplary forms of supports described will provide in effect afloating mounting insofar as displacement of the motor bodily intheplane of disposition of the belt drive is concerned. Full ways move toparallel positions and the motor v cannot shift sideways.- .f

to the line of p ull of the drive belt. The result advantage maytherefore be taken of the reactance torque thrust of the motor to rollthe motor bodily in a belt-tightening direction and since this torque isgreatest at the moment of starting when the load is greatest, an eicientbelt drive will be achieved.

It will be readily appreciated that .other forms of application of thisinvention may be devised without departing from the principal feature asherein set forth.

What we claim as our invention is:

1. In a motor mounting, a motor, a base, means for mounting said motorfor substantial rolling action relative to said base, includingspacedapart spring strips forming a resilient anchorage between the baseand motor, and a third spring strip disposed intermediately between theaforesaid spring strips in resilient opposition thereto and co-operatingwith the motor and with said pair of spring plates and resilientlysupporting a tremity of the motor spaced only slightly above the base,said cradle support including separate curved spring plates secured atopposite ends in oppositionally disposed relation to opposite sides ofthe motor and to said base.

3. In a motor mounting, a motor, a base, means for resilientlysupporting said motor for substantial rolling 'action relative to saidbase including spaced-apart spring strips secured to the side of themotor below the level of the axis and extending tangentially under themotor and rigidly secured to the base at the opposite side of securementto the motor and forming a resilient support and anchorage between thebase and motor, and resilient means interposed under tension betweensaid spaced-apart spring strips and between the lower periphery of themotor and the base and resiliently relieving said spring p strips of thefull weight of the motor.

cushioninglroller support for said motor and relieving said resilientmounting means of the full Weight of the motor,`

CARL G. H. ANDERSON. IVAR K. FOG.

